<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>08_固定定位</title>
  <style>
    .fu {
      background-color: yellow;
    }
    .fu>div {
      width: 100px;
      height: 100px;
    }
    .z1 {
      background-color: #f00;
    }
    .z2 {
      background-color: #0f0;
      position: fixed;
      bottom: 0;
      right: 0;
    }
    .z3 {
      background-color: #00f;
    }
  </style>
</head>
<body>
<div class="fu">
  <div class="z1"></div>
  <div class="z2"></div>
  <div class="z3"></div>
</div>
</body>
</html>
